A Slotted Aloha Message Concentration Protocol for Wireless Sensor Networks

摘要: Wireless sensor network applications, including the Internet of Things (IoT), will benefit from message concentration protocols, which gather messages originating at a large number spatially distributed nodes (devices) into small subset those nodes, each holding messages. This facilitates more efficient access to or cloud, in aggregate, than when device seeks individual direct access. Such protocols must be lightweight and capable operating without knowledge (potentially dynamic) topology. In this paper we propose an extremely simple multi-round Aloha-based protocol, wherein set live round randomly partition transmitters receivers, receivers collect all within range. The protocol requires judicious choice both contention probabilities transmission powers effectively tradeoff between four performance metrics interest - degree concentration, fraction lost messages, delay, power. We analyze special case using basic results stochastic geometry branching processes.